Seal-lock



(No Model.) 2 Sheets-Sheet 1.

J. P. INGHRAM.

Y SEAL LOGK. No. 304,649. 'Patented Sept. 2, .1884.

(No Model.) 2 Sheets-Sheet 2.

J. P. INGHRAM. SEAL LOCK. No. 304,649. Patented-Sept.' 2,- 1884.

5/ il? lll.

llamen STATES,

Partnr @tirreno JOHN F. INGHRAM, OF ALLEGHENY, PENNSYLVANIA.

SEAL-LOCK.

SPECIFICATION forming part of Letters Patent No. 304,64@y dated September 2, 1884.

Application inea Novemberze, 1883. (No man.)

To all whom it may conce/oe.

Be it known that I, JOHN F. INGHRAM, of the city ot' Allegheny, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Seal- Locks; and I do hereby declare the following to be a full, clear, and exact description thereof.

My invention relates to an improvement in seal-locks; and it consists in the arrangement and construction of devices whereby a rotary movement is imparted to the bolt as it is raised or lowered, in devices for locking the bolt, and in devices for locking the seal.

I will now describe my invention,so that others skilled in the art may manufacture and use the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figure l is a perspective view of my improved lock. Fig. 2 is a detached view ofthe locking-dog. Fig. 3 is a detached perspective view of the inside of the face-place. Fig. 4 is a vertical sectional view of the lock. Fig. 5 is a front elevation ofthe lock. Fig. 6 is a front elevation of a modiiied form of my improved lock, the face plate V,being removed. Fig. 7 is a side elevation of the same. Fig. 8 is a side elevation of the same, partly in section. Fig. 9 is a detached view of th-e locking-dog. Fig. l0 is an elevation ofthe inside of the face-plate, and Fig. 1l is a detached view of the seal.

Like letters of reference indicate like parts wherever they occur.

In the drawings, a represents the front or face plate, and b the rear plate, which plates are united by rivets or bolts, and together form the case ofthe lock.

Extending through the lock-case is the verton the rear plate. AThe upper end of this lug 'L' is at right angles tothe face of the plate b, forming a shoulder or rest, j, which sup- 'ports the lug e and retains the bolt in its ele` vated position.

Inside ofthe locken-se is a sliding yoke or dog, 7c, having parallel arms k k', with fiat edges, which rest on the face of the plate b, and a curved front portion,which rests on and over the bolt c. On the face of this dog is a projecting button, m, which extends through an oblong` slot or opening, u, in the i`aceplate a.

VIn the lower edge of the dog 7.'` is the slot o, which is adapted to engage with a lug, p, on the bolt c above the lug e, extending from the bolt at right angles to the lug e.

On the outer side of the face-plate a is abracket for the reception of the seal, which bracket is formed by the recessed projecting lugs g, which are arranged at the sides of the opening a, so that the opening shall be closed by the insertion of the seal in the bracket.

Above the lock-case, Von the bolt c, on a line with the lug p, is a projecting lug, a', which, when thehbolt is lowered, is brought above the seal and prevents it'from being removed from the bracket.

Below the lock-case, on the face of the plate b, is a thimble, s, through which the bolt passes when it is lowered.

The operation is as follows: rlhe bolt being in a raised position, in order to lock the cardoor, the hasp is placed over the thimble s, the seal t, which is a flat frangible seal, is placed in the bracket q by sliding it downward from the top of the lock-case inthe dovetails or recesses in the lugs, and the bolt c is lowered by giving it a half-revolution on its axis by the arm d, the bolt being guided by the face e of the lug e traveling on the inclined face of the lug t' and the groove h,and the face ci traveling on the inclined face of the notch which inclines form the spiral, until` the end of the bolt passes through the thilnble over the hasp. When the bolt is raised to its elevated position, the dog l; is lifted by thelng c, and as the lug p passes under the inclined lower edge of the dog la the dog is retained thereby in its elevated position until the lug comes under the slot o, when the dog falls by the force of gravi- IOO ly and ineloses helug in the slot. At the saine time the lug a' is brought over the upper edge ofthe seal t, and in such a position that the seal Cannot he removed from the bracket. By these meansthe boltis loeked,as it is prevented from being turned on its axis by the dog Jengaging with the lug p, and owing to the spiral it cannot be raised without turning on its axis, and the seal is locked by the lug r.

In order to unlock the bolt, it is rst necessary to break and remove the seal, so as to obtain access to the opening a. When the seal is broken, the dog 7a may be raised by the lug or button m, which releases the lngp from the slot o, allowing the bolt c to be raised to its original position, the lug c resting on the shoulder j.

In Figs. (i, 7, 8, 9, 1i), and 1l of the drawings my improved lock is shown arranged to be used with a seal having an internally-projecting shank, u, and button x, thei'ace of' the seal resting in a recess, o, in the outer face of the plate a., the shank of the seal entering the lockcase through an opening, w, in the center of the recess Z), and the button x at the end ofthe shank engaging with an inclined slot, y, in the bolt c, in which position it is locked by the dog k, the slot o, which is less in Width than' the button, inelosing the shank of the seal.

rlhe operation is as follows: The bolt c being in a raised position, the dog being supported in the upper portion of the lock-case by the lug c, the shank of the seal is inserted through the Opening w, the button x coming in contact with the bolt c. rlhe bolt cis t-henlowered, in the manner already described, until the end enters the thiinble r and secures the hasp. At the same time, theinelined slotg/ being brought under the opening ai, the button x enters the slot, which releases the dog L, so that it falls and ineloses the shank ol" the seal. By Ithese means the bolt is locked, so that itcannot be 1 turned on its axis, and thereby raised Without breaking the button from the shank ofthe seal, and the seal is locked by the dog 7i. In order to release the hasp, the bolt is turned on its axis by the arm d, which breaks the button x, and thereby mutilates the seal. Vhen the button is broken from the shank, it falls t0 the bottom of the lock-case and out through the opening e.

Having thus described my invention, what l claim, and desire to secure by Letters Patent, isa

l. In a seal-lock, the combination of a bolt susceptible of axial as Well as longitudinal movement, a spiral or inclined plane engaging with the bolt to guide the movement ol" the bolt, and to prevent the bolt being raised without at the saine time being turned on its axis, and a device or devices for locking the bolt by preventing its being turned on its axis, substantially as and for the purpose specified.

2. ln a seal-lock, a bolt susceptible of axial as Well as longitudinal motion,vengaging with an inclined plane or spiral, which prevents the bolt being raised Without at the same time being turned on its axis, a dog which enga-ges with the bolt when in a locked position, to prevent the turning of the bolt on its axis, a bracket for the reception of a frangible seal, which seal prevents access being had to the lockingdog, and devices for engaging the bolt with the seal when the bolt is in a locked position, to prevent the seal being removed from the bracket without being broken, subst-air tiall y as specified.

In testimony whereof Ihave hereunto set my hand this lGth day of November, A. D. 1883.

JOHN F. INGHRAM.

Titnessesc Tnoims XV. BaKnWnLL, JOHN S. KENNEDY. 

